Originally Posted by
Scooper
Andy, I did have to experiment a bit to get the right drill speed, feed pressure, and lubrication to minimize the chatter, but eventually seemed to hit the right combination. The other thing that helped is using quality fine tooth (10 teeth/inch) hole saws instead of the cheapie in the photo.
Stan, Where did you get your hole saws? I bought some from this site
http://syncnotcher.com/twits/ as well as some thin wall tubing supports (which I really like), but the saw's are fairly out of round. I'd like to find something better. Thanks
BTW, I use the Harbor Freight notcher as well. Had to shim up the clamp to center the saw, and when using the tubing supports it works out pretty good.